Type-writing machine.



G. 10. BLIO KENSDI-..RFER.

TYPE WRITING MACHINE. APPLICATION FILED APR. 10, 1908.

Patented Oct. 11, 1910.

2 SHEETS SHEET 1.

Patented Oct. 11, 1910.

2 SHEETS-SHEET 2.

BLIGKENSDERFER.

TYPE WRITING MACHINE. APPLICATION FILED APR. 10, 1908.

To all whom it may concern.-

rim nszmras ratrnnfr onmoa i ononon a 'nmcxn'nsnnnann, or swam-01in, .connnorrou'r."

TYPE-WRITING MACHINE.

- Be it-known that I, GEORGE. C'. BLtcKnns- DEBFER, a citizen of the United States,-res1ding at Stamford, county of Fairfield, and State of Connecticut, have invented certain new and useful Improvements'in Type-Writing Machines, fully described and represented in the following same.

This invention relates to certain improvements in carriagecontrolling mechanism for typewriting machines.

r fore provided with. devices by which the carriage may be jumped orstepped back- Ward, that is, in a direction opposite to that moved by the ordinary step of spaces, the usual purpose of such devices I being to facilitate the positioning ofthe carriage in making corrections. Such devices have, however, usually been applied to typewriting machines which depend for the1r st ep-by-step feeding movement on the action of an escapement, that is to say, thecarriage is continually under the stress of an advanc-- I ing spring which elfects the feed of the carriage step-by-step through the escapement mechanism. The object of the present invention'is to produce an improved mechanism for giving the carriage a limited movement in a direction opposite to that effected by the step-by-. step advancing devices,

to machines in which the feed of the car-- riage is produced by a positively operated feeding device which is thrown into and out ofoperation to effect the feed as distin- 1 with said devices,

st ep by-step advancing duce a device which, tended. to give the carriage alimited moveguished from an escapement mechanism.

A further object of the invention is to produce a new and improved mechanism for.

giving the carriage a limited movement in a direction opposite to that produced by the devices, said mechanism cooperating with the advancing devices to position the carriage as desired. 4

A further object of the invention is to prowhile primarily inment in a direction opposite to that roduced by the step-by-step advancing devices, may also, through other suitable connections be operated to feed the carriage in either direction. The invention extends'to certain detailsof specificationand the accompanying drawings, forming a part of the writing machineshave been heretooperation of which is applicable- Speciflcation of Letters-Pann n Patented. Oct, 11, 1910, Application filed April 10, 1908.

,Serial No. 426,203.

construction by which the various devices employed may be simply and efiectively opshowing the parts in different position; Fig.

a is a view similar to Fig. 3, but showing the parts in a still different position;-and Fig. 5 is a detail view illustrating the position of the parts ofthe feeding mechanism in a position intermediate the positions shown in Figs. 2 and 3. a

The typewritin machine illustrated in the drawing, and ihich has been selected to derfer type. It is to I ever, that the machine is not to be confined to machines of this type, butmay be embodied in machines differing widely from this type. I In the particular machine illustrated,

the said base serving to are mounted.

type'mechanism, as is characteristic of the Blickensderfer machine, lsecured to a shaft 5 in any suitable manner. This shaft 5 is'provided with a gear timeshing with two racks, is illustrated. The movements of these racks are produced from two sectors, one of which with teeth 9 which mesh with the teeth on segments 10 formed on the arms which carry the racks. The shaft 5 passes througha rock shaft 11 suitably supported in the. frame,

there is provided a base I mounted on feet 2,

support a frame 3 in which the operative parts'of the machine illustrate one embodiment of the invention, 1s a machine of the well-known Bnckens' be understood, how- In the particular machine illustrated, the

consists of a wheel one of which, marked 7,

is indicated at 8, this sectorbeing provided and the proper movements of the type mechanism are produced from key levers 12,

the .depression of each key lever causing movement of the rock shaft 11. The detail construction of this type mechanism and its operation has-n0 bearing on,the present invention, and it will therefore not be fully described,.but reference is -made to Patent No. 583,840, granted to Geor e C. Blickensderfer June 1st,'1897, in w ich its con-- struction and method of operation are fully described.

The'carriage of the machine may be of any suitable construction. In the particular 'machine illustrated, it consists .of a sliding it will include suitable engaging devices which are brought into engagement to effectthe feed,the carriage being free from any stress of the feeding devices, that is to say,

not being under the influence of any mechanism which tends to give it a movement except when these engaging devices are in engagement. In the machine illustrated, these enga'gin devices include a rack bar 17 pro vided with teeth 18, this bar being secured to the carriage in any suitable manner.. The cooperating feeding devices in the particular machine illustrated comprises a feeder, as 19, this device being provided with teeth 20 which engage the teeth 18 on the bar 17. Suitable means will be provided by which the feeder is caused to be engaged with and disengaged from the coiiperating engaging means on the carriage. The particular construction of these means may be varied, and

- will be varied according to the type of feeder and cooperating devices emp oyed. In the particular construction illustrated, the-feeder is formed in one piece, with an arm 21, this arm being pivoted at 22 to one of the arms 23 of a bell crank lever 23, 24, this bell crank lever being pivoted at 25 to the base of the machine. This bell crank lever, in the particular machine illustrated, is operated from -a slide 26. This slide is, as shown, provided with an enlarged head 27 working between guides 28 formed on the v bed plate of the machine. The end of the slide opposite the head may, to reduce friction, be supported on a friction roll 29 pivoted in the bed plate of the machine. The

. connection between the bell crank levers 23, 24 and the slide may be eifected, as-

illustrated, by providingthe arm 24 of the bell crank with a slot as 30, the-slide having a pin 31 which engages the slot. The end of the feeder in the particular construction illustrated, is provided with a beveled surface 32 which cooperateswith a guide-block 33 suitably secured to the base of the machine, The arm 24 of the bell crank and the arm 21 carrying the feeder block may be connected by a light spring, as34.

These standards serve to.support the Whic With the construction as so far described, it will be understood that as the slide 26 is moved in one direction, the, bell crank lever 23, 24 is rocked and the. feeder block is drawn out of engagement with the teeth 18 on the rack 17,and at the same time the block is drawn back,.the ositions of the parts being indicated, for instance, in Fig.

4. If the slideis moved inthe opposite direction, the feeder bloc'k will be caused to engage with the teeth on the rack and thus advance the carriage. It will be noted, however, that during the tifne when the feeder block is out-of engagement with the rack, the carriage is entirely relieved from the action of the feedin devices. The means for operating the fee er actuating slide, when this form of actuating mechanism is employed, may be widely varied. In the particular construction illustrated, there is loosely mounted on the shaft 11 a bell crank lever 35, 36, the arm 36 being slotted and beingl engaged by a pin 37 on the shaft 5 as efore pointed out, carries the type-wheel 4. Each time, therefore, a key is depressed to operate the type-wheel this bell crank lever 35, 36 will be rocked. The arm 35 of this bell crank lever carries a pin 38 which engages an upstandin arm 39 carried on the actuator sllde 26. his actuator slide has secured toits underside a pin 40 to which is secured a spring 41, the

'other end of this spring bein secured to a pin 42 on the bed plate. Each time a key is depressed, therefore, the spring 41 is placed under operating tension so that when a key is depressed and released the actuator slide will be given a complete reciprocation.

As will be readily understood, the actuator feed slide will be arranged so as to be operated from the spacing mechanism as well as from the type operating mechanism. In the particular machine illustrated, the spacer consists of a lever 43 which is hooked around a'rod 44, this spacer, as well as the type levers, being held in position by certain springs not shown, the construction, however, being fully shown and described in Patent No. 583,840, before referred to. As illustrated, this spacer carries a two-armed lever 45, 46, this two-armed lever being pivoted at 47 to the spacer 43. The arm 46 of this two-armed lever hooks over the plate 48 on the front of the machine, and the arm 45 engages a slot 49 in the actuator slide 26.

The construction by which the movement of the carria e, in a direction opposite to.

lar

ma mretractor plate provided with 'an'operating tooth 51. This retractorplate'in the particular machine illustrated is operated from an actuator comprising a slide 52, the connection between the retractor and its actuator slide being effected byproviding the actuator with a slot 53 through which passes a pin 54, this pin being secured to the actuator slide. 'By this construction theretractor plate has both a swinging and slidiug connection with the actuatorslide.

The carriage is provided in the particumachine illustrated with means which may be engaged by the retract-or so as to give it the backward movement as illustrated, this means consisting of teeth 55 formed on the bar 17, before referred to.

The rctractor actuating slide, when the same is employed, may be mounted in any suitable manner. As shown, it is supported in guides 56," 57 formed on the underside of the bed plate 1, the end of the slide which carries the retra ctor plate being bent upward, as clearly shown in Fig. 1.

Any suitable means may be employed for operating this rctractor actuating slide. In the construction illustrated, there is employed a'key lever 58 pivoted at 59 to the bed plate of the machine, the operating end of the lever being formed with a thumbpiece 60, as shown. The other end of the lever is bent downward, as indicated at 61 (see Fig. 1) and extends through a slot 62 formed in the bed plate and into a slot 63 formed in the actuator slide. v The particular construction illustrated is of such a character that the retract-or is first brought into engaging position by .movement of the slide 52, it beingthereafter operated by the continued movement of the slide to give the carriage its backward movement. The means by which this movement of the rctractor plate is effected may be widely varied. As shown the plate is provided with a cam surface 64 whichv is engaged by a pin 65 on the returning spring as 66 (see Fig. 2) may be employeththis spring being connected to an car 67 formed ,on the rctractor and to an arm (58 extending from the rctractor operating slide. In the particularmachineillustrated, the means by which the step-by-step advancing movement of the carriage is effected should be disengaged so as'to permit the rctractor to effect the backward'movement of the carriage before the rctractor -starts to move the carriage. lVhile this may be effected in various ways, in the partic'ular construction illustrated the rctractor operating slide has secured to its underside a plate 69, the attachment being effected by screws 70 or in any other suitable manner. These screws 70 pass through slots 71 in the plate 69, so that the actuator slide may have a slidin g movement with respect to the plate.

, This plate is provided .with

rctractor slide. A

which, cooperates with a pin 73 depending from. the feeder ,operating slide 26. The plate 69 may be further connected to the actuator slide by means of a suitable-spring, as73.' i, To prevent any reboundingofr the car.- riage after the feeding devices have operated, suitable locking'pawl 74 maybe provided, and this pawl may be carried on an arm 75 pivoted to the bed plate of the a finger 72,

machine, the otherend of the arm being also connected to the bed plate and-by spring 76 (see- Fig. 2). i

The amount of backwardmovementgiven eterthe carriage by the rctractor may be mined in any suitable manner. As shown, the retra'ctor plateis formed with a projec.'

,tion 7 7, this projection being arranged,when

the rctractor has reached its rearmost position, before mentioned and prevent its further movement.

With the construction as described, be-

desired to operate the retractor,and assuming the parts to be inthe position shown in Fig.2, the retractor slideoperatingkey, is thrown over, thus causing the rctractor slide to be moved until the tooth 51 on the i rctractor plate engages between two of the teeth 55 onthe carriage rack. =T;his position ofthe parts is well As the parts move intothe position shown in Fig. 3,'the finger 'ating slide 26, moves this slide back, thus rocklng the bell crank lever 23, 24 and dis-' engaging the feeder from the rack, the lock ing pawl 74 being also moved out of locking position by the same movement, for the reason that the end of the arm 75 lies behind the arm which carries the feeder block .19. A further movement of the actuator slide causes the pin 65 to cooperate withthe cam surface 64 on the'retractor plate, thus swinging the plate from the position shown in Fig. 3 to thatshown in Fig. 4, and at the same time moving the carriage back. This' to strike against one of the guides 14 illustrated in Fig. 3;.

72 on. the plate 69, cooperating with the pin 73 on the feed opermovement of the carriage is, in the particular mechanism shown, equal 'to two spaces, that-is, it is twice the amount of movement ofthe carriage produced by the feeder block when it advances the. carriage. Pressure being nowremoved from the key which operates the actuator slide, this slidereturns to its normal position, and at the same time the slide 26- moves back, throwing the feeder into engagement with the rack on the carriage and causing the carriage-to be advanced one'space. Since, however,-the retractor moves the carriage back two spaces,- the result of 'the entire operation will be that the carriage will have been moved back one space from the'position it occupied when the retractor. mechanism was operated.

. therefore, to be'li'mited to the specific contion with a carriage having step by step ad mechanism. This may be accomplished by that itreceives less than its full movement,

causing the feeder to engage with the rack vices, a carriage retractor, and connections tions between'the actuators whereby an op- I eration of the retractor actuator effects the feeder, actuating means for causing the ing a key, and connect-ions between the re- If desired, thecarriage may be moved forward as well as backward by the retractor actuating the retractor slide in such a Way the movement being sufficient, however, to actuate the feed operating slide 26. The position which the parts, when thus operated, give the retractor slide, is illustrated in Fig. 5. By reference to this figure it will be seen that while the retractor slide has been moved a certain distance,it has not been moved far enough to bring the retractor tooth into engagement wit-h its cooperating teethi onthe bar 17. When, therefore,'the retractor slide is released, the feed slide will again advance,

on the carriage and advance the carriage one space.

Changes and variations may be made in the construction by which the invention is carried into effect. The invention is not,

whereby when the retractor is operated the engaging devices are disengaged.

3. In a typewriting machine, thecombination with a carriage, of means for giving the carriage a step by step advancing movement, said means including engaging members, one of which is mounted on the carriage, an ac-- tuator for said feeding device, a carriage retractor, an actuator therefor, and connecoperation of the other actuator.

4. In a typewritmg machine, the combination with .a carriage having a rack, of a feeder to engage the rack and advance the carriage, a carriage retractor, an actuator therefor, and connections between the actuator and the actuating means.

In a typ'ewriting machine, the combinavancing devices, a retractor, actuating means for the'retractor, sald means includtractor actuating means and the advancing deviceawhereby the operation of the' re- 1 I carriage tractor key the carriage may be fed either forward or backward.

6. In a typewriting machine, the combination with a carriage having a rack, of a feeder, actuating means for the feeder, a carriage retractor, an operating slide therefor, and connections between the feeder actuating means and the slide.

7. In'a typewriting machine, the combination witha carriage, of a retractor, an actuator slide on which the retractor is mounted, a cooperating retracting means mounted on the carriage, connections between the retractor and the'slide whereby the slide may have a continued movement with relation to the retractor after the retractor has engaged the means on the carriage, and devices mounted on the slide whereby the continued movement of the slide effects the movement of the retractor.

8. In a typewriting machine,'the combination with a carriage, of retracting means mounted thereon, a retractor, an'operating slide on which the retractor is mounted, a slip connection between the actuator slide and the retractor, and means on the slide operating to give the retractor a movement after it has been caused to engage with the retracting means on the carriage. 9. In a typewritingmachine, the combination with'a carriage, of step by step advancing means therefor, a retractor, connectionsfrom the retractor to the advancing means whereby the advancing means are thrown into operation to advance the carriage for a distance less than that'which it has been moved by the retractor, and operating means for the retractor.

10. In a typewriting machine, the combination with a carriage having a rack, of a feeder, actuating means for the feeder including a slide whereby the feeder is disengaged from, engaged with and caused to advance the carriage, a carriage retractor, actuating means therefor, including a slide and key, and connections between the two slides.

11. In a typewriting machine, the combination with a carriage having a rack, of a feeder, means for o aerating the feeder to cause it to engage wit the rack, advance the and be disengaged therefrom, means on the carriage with which the retractor engages, operating means for the retractor including a slide with which the retractor has a pivoted and sliding connection, means carried by the slide for turning the retractor on its pivot, and connections between the retractor operating means and the feeder operating means.

12. In a typewriting machine, the combination with a carriage having a rack, of a feeder, an actuator slide therefor, a retractor, an actuator slide therefor, a pivoted and slidin connection between the retractorkind my hand, in the presnce bf two subscribing its slice, means including a cam whereby the Witnesses. movement of the retractor slide swings the retractor on its pivot, a key fdr operating GEORGE BLIOKENSDERFER' the retractor slide, and connections between Witnessesr the slides. 7 JAMES Q. RICE,

In testimony whereof, I haveherenntq set A. WHITE; 

